Not really a midpoint, but more on a similar level to Index. Generally, people like Index more than the Vive Pros on most points (display, audio, controllers, etc.) except for the wireless capability, and some niche features like eye tracking on the Vive Pro Eye. If you want a wireless high-end headset, Vive is the only game in town (Index is wired-only) so you have to get a Vive. It'll end up being more expensive than Index because the wireless adapter is $350. Since the Vive Pros and Index share the same tracking system, people do mix and match equipment other than the headset though. Many people will buy a Vive Pro headset and use Index controllers with them, since they're better. Index users will buy Vive trackers for full-body tracking because nothing equivalent exists for the Index.

That's still their flagship I think, check out their other lines like the cosmos which has AR/VR type camera integration etc, room scale without the base stations and so on.